diff -ur vagrant-1.9.7.orig/vagrant.gemspec vagrant-1.9.7/vagrant.gemspec
--- vagrant-1.9.7.orig/vagrant.gemspec	2017-08-16 11:52:01.226243101 +0300
+++ vagrant-1.9.7/vagrant.gemspec	2017-08-29 15:32:55.920511390 +0300
@@ -27,7 +27,6 @@
   s.add_dependency "net-scp", "~> 1.2.0"
   s.add_dependency "rb-kqueue", "~> 0.2.0"
   s.add_dependency "rest-client", ">= 1.6.0", "< 3.0"
-  s.add_dependency "wdm", "~> 0.1.0"
   s.add_dependency "winrm", "~> 2.1"
   s.add_dependency "winrm-fs", "~> 1.0"
   s.add_dependency "winrm-elevated", "~> 1.1"